gallery linking to full-sized images

I love the new gallery feature you guys installed...kudos for that. Just one problem I'm having: when I post a gallery (like I did here) and I click on one of the thumbnails in the gallery, it takes me to a page that displays the medium-sized version of the picture. How do I get those links to take people to a full-sized image? I want them to be able to actually see the picture when they click through.